First polymer in Comet Halley: Polyoxymethylene

PDF Version Also Available for Download.

Description

The RPA2-Positive Ion Cluster Composition Analyser (PICCA) on the Giotto spacecraft detected five mass peaks with regular spacing of about 15 amu up to about 120 amu. Starting at about 45 amu, the peaks decrease in intensity with increasing mass. Within their half-width they are in good agreement with dissociation products of formaldehyde polymer (POM). We suggest a production sequence in which cosmic radiation formed POM from water and carbon monoxide on grains that were aggregated into cometisimals. Other polymers, possibly containing CN, may also exist. Observations suggest that at least some of the H-, C-, and O-containing dust particles ... continued below

Physical Description

Pages: 6

Creation Information

Huebner, W.F.; Boice, D.C. & Sharp, C.M. January 1, 1987.

Context

This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

Who

People and organizations associated with either the creation of this article or its content.

Publishers

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this article. Follow the links below to find similar items on the Digital Library.

Description

The RPA2-Positive Ion Cluster Composition Analyser (PICCA) on the Giotto spacecraft detected five mass peaks with regular spacing of about 15 amu up to about 120 amu. Starting at about 45 amu, the peaks decrease in intensity with increasing mass. Within their half-width they are in good agreement with dissociation products of formaldehyde polymer (POM). We suggest a production sequence in which cosmic radiation formed POM from water and carbon monoxide on grains that were aggregated into cometisimals. Other polymers, possibly containing CN, may also exist. Observations suggest that at least some of the H-, C-, and O-containing dust particles detected by the Particle Impact Analyser (PIA) on board of the Giotto spacecraft and its equivalent (PUMA) on the Vega 1 and 2 spacecraft contain POM. The properties of POM are consistent with many of the unexpected observations in the coma. 22 refs., 4 figs., 1 tab.

Physical Description

Pages: 6

Notes

NTIS, PC A02/MF A01.

Source

  • Conference on similarities and dissimilarities of comets, Brussels, Belgium, 6 Apr 1987

Language

Item Type

Identifier

Unique identifying numbers for this article in the Digital Library or other systems.

  • Other: DE87010139
  • Report No.: LA-UR-87-1793
  • Report No.: CONF-8704138-1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 6215206
  • Archival Resource Key: ark:/67531/metadc1106615

Collections

This article is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this article?

When

Dates and time periods associated with this article.

Creation Date

  • January 1, 1987

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

Description Last Updated

  • June 4, 2018, 1:37 p.m.

Usage Statistics

When was this article last used?

Congratulations! It looks like you are the first person to view this item online.

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Huebner, W.F.; Boice, D.C. & Sharp, C.M. First polymer in Comet Halley: Polyoxymethylene, article, January 1, 1987; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1106615/: accessed August 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.